Arsenic and its compounds have been known to be toxic for millennia. Arsenic trioxide (As2O3), often referred to as white arsenic, was a favored poison in the Middle Ages because it had little odor or taste, enabling it to be easily incorporated into the food or drink of a victim. As little as 300 mg can be fatal to an average person.
Solutions to an age-old threat
WQP spoke with Dow Water & Process Solutions Global Senior Application Development Specialist Fredrick W. Vance, Ph.D., about advances in arsenic removal research and the challenges of keeping costs at a minimum, responsible waste handling and continually improving adsorbent media.
Groundwater project demonstrates successful arsenic remediation
Arsenic and uranium in drinking water supplies
ResinTech ASM-10-HP is a strongly basic hybrid anion exchange resin specially formulated to selectively remove arsenic. It is supplied in the salt form as clean, moist, tough, uniform, spherical beads. ResinTech ASM-10-HP exhibits extraordinary throughput capacity in arsenic removal service on potable water supplies. Its performance is virtually unaffected by common anions, such as chlorides, bicarbonates or sulfates. It is effective over the entire pH range of potable water.
LayneRT is an NSF/ANSI 61 certified and approved arsenic removal media. It is a hydrous iron oxide impregnated resin that binds arsenic and never needs backwashing. It was designed for use in npXtra home treatment systems to reduce arsenic well below the U.S. EPA’s MCL. Once the lead column has exhausted, the tank with media can be sent back to SolmeteX for environmentally responsible disposal.
LayneRT, manufactured by SolmeteXWater, is an NSF/ANSI 61 certified and approved arsenic removal media. This media is a hydrous iron oxide impregnated resin that efficiently and safely binds arsenic, and never needs backwashing. LayneRT was designed for use in our npXtra series of home treatment systems to effectively reduce arsenic well below the U.S. EPA’s MCL. Engineered in a lead/lag configuration to provide the best level of protection, the tanks are connected by a proprietary control head that provides valves for sampling the influent and effluent of both tanks.